JP2003101866A - Optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems that the light quantity distribution on an image pickup surface changes in synchronism with a shake compensating operation, and brightness of a photographing image fluctuates. SOLUTION: In an optical device provided with an image pickup element 3 for photoelectrically converting an optical image formed by a photographing optical system 1, a shake detection means 5 for outputting signals corresponding to device shake, and a shake compensating lens 2 provided inside the photographing optical system for compensating the shake of a photographed image by being driven so as to have its optical axis tilted corresponding to the output from a shake detection means, control means 14 and 7 are provided for changing an output gain to a received light quantity of each pixel in the image pickup element on the basis of signals from the shake detection means when the shake compensating lens is driven.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device having a shake correction function for correcting shake of a photographed image caused by shake of the optical device.

[0002]

2. Description of the Related Art Various optical devices having a function of correcting camera shake or image shake have been proposed. For example, as shown in FIG. 5, a so-called variable apex angle prism 100 is arranged in front of an optical system including the lens groups 101 to 104 and the diaphragm 105, and the variable apex P is incident on the optical system before the light flux P from the subject enters the optical system. An optical device that corrects image blur by changing the apex angle of the prism 100 has been proposed.

A fixed lens barrel 106 supports the lens groups 101 to 104 and the diaphragm 105, and a fixed lens barrel 107.
6 is a CCD which is an image pickup device for converting an optical image provided on the rear end focus surface into an electric signal.

However, in the above-described optical device using the variable apex angle prism, the variable apex angle prism 100 is arranged in the widest part of the light beam P passing through the optical system. It is disadvantageous to change.

Therefore, in order to reduce the size of the optical device, an optical device in which a variable apex angle prism is arranged between two lens groups inside an optical system consisting of a plurality of lens groups, and among the plurality of lens groups, There has been proposed an optical device having an optical image blur correction function such as a so-called lens shift system in which a certain lens group is moved in the direction orthogonal to the optical axis to correct the blur.

Further, a CCD having an area larger than an area actually required for image pickup is used as an image pickup element (needlessly, a large optical system in which an image circle covers the entire surface of the CCD is required), and the image pickup element is provided in accordance with camera shake information. The shake is corrected by moving the image reading position above. An optical device having an electronic shake correction function, which is so-called electronic image stabilization, has been proposed.

[0007]

Since the conventional optical device having the image blur correction function is configured as described above,
For example, as shown in an optical system having convex-concave convex-concave lens groups 111 to 114 and a diaphragm 115 shown in FIG. 6, an off-axis light beam b is different from an on-axis light beam b passing through the center of the optical system.
Alternatively, as indicated by B, the upper and lower light beams are blocked by the effective diameters of the lenses 111 and 114. For this reason, a light beam incident from a larger angle (a light beam corresponding to the periphery of the screen) becomes thinner. Therefore, on the image plane 116, there occurs a phenomenon in which an image is abruptly darkened toward the periphery, that is, so-called vignetting causes a peripheral light amount drop.

As described above, in the optical shake correction function for correcting the image shake by deviating the light beam inside the optical system,
If the image of the subject on the image plane is corrected so that it does not move when the relative angle between the subject and the optical device changes, the relative angle between the subject and the optical device changes, so The vignetting degree of the light flux with respect to each point of the image changes, and the light amount distribution of the subject image changes.

FIG. 7 shows this state, in which the horizontal axis represents the image forming position and the vertical axis represents the brightness. The alternate long and short dash line in the figure shows the light amount distribution in the initial state before the relative angle between the subject and the optical device changes, and the solid lines a and b indicate, for example, when shake correction is performed when the relative angle changes alternately left and right. The light intensity distribution of is shown.

As described above, when the actual continuous camera shake is corrected, even if the subject is corrected and stopped on the screen, the difference in the light amount distribution indicated by the solid lines a and b is synchronized with the camera shake and the brightness on the screen is increased. It appears as fluctuation. In particular, in the peripheral portion of the screen, there are large variations in brightness, resulting in an image of poor quality.

Also in the electronic shake correction function,
As shown in FIG. 6, since the relationship between the optical system including the lens groups 111 to 114 and the diaphragm 115 and the image forming surface 116 is immovable, the light amount distribution on the image forming surface 116 does not change.
When the relative angle between the subject and the optical device changes and the subject image moves, the image reading position is changed by following it (for example, it is moved between the reading position 1 and the reading position 2 in FIG. 8). A phenomenon similar to that of the optical image blur correction function occurs.

It is therefore an object of the present invention to provide an optical device which makes it possible to obtain a high-quality and easy-to-see image by making inconspicuous the brightness variation in the photographing screen that occurs in synchronization with the shake correction.

[0013]

In order to achieve the above object, in the first invention of the present application, an image pickup device for photoelectrically converting an optical image formed by a photographing optical system and a signal according to a shake of the device are output. A so-called optical protection unit having a shake detecting unit for correcting a shake of a captured image by being driven in a photographing optical system so as to tilt an optical axis according to an output from the shake detecting unit. In the shake-type optical device, when the shake correction lens is driven,
There is provided control means for changing the output gain with respect to the amount of light received by each pixel in the image sensor based on the signal from the shake detection means.

This makes it possible to adjust the output gain of each pixel of the image pickup device according to the change in the light amount distribution on the image pickup device due to the movement of the shake correction lens. Therefore, even if the amount of light (distribution) incident on the photographic optical system is uniform, if there is a drop in the peripheral light amount on the image plane due to optical restrictions of the photographic optical system, the amount of light on the image sensor due to movement of the shake correction lens Even if the distribution changes, the output gain can be adjusted so that an output equivalent to that in which all pixels receive the same amount of light is obtained from all pixels. Therefore, the brightness variation in the photographing screen, which has conventionally occurred in synchronization with the drive of the shake correction lens, hardly occurs.

Specifically, storage means for storing light amount distribution information of the light passing through the image pickup optical system on the image plane is provided, and from this storage means, on the image pickup element according to the signal from the shake detection means. The light intensity distribution information is read. Then, based on the read light amount distribution information, the output gain of the pixel on the side of high light reception is changed to be equal to the output gain of the pixel on the side of low light reception, or the pixel on the side of low light reception is changed. The output gain may be changed so as to be equal to the output gain of the pixel on the side where the amount of received light is large.

Further, in the optical device of the second invention of the present application, the image pickup device for photoelectrically converting the optical image formed by the photographing optical system, the shake detecting means for outputting a signal according to the shake of the device, and the shake detecting means are provided. In a so-called electronic image stabilization type optical device having a control means for correcting the shake of the captured image by moving the image reading area on the image pickup element in accordance with the signal of (3), the shake correction is performed in the control means. At this time, the output gain with respect to the light receiving amount of each pixel in the image reading area is changed based on the signal from the shake detecting means.

Thus, the output gain of each pixel in the image reading area can be adjusted according to the change in the light amount distribution on the image reading area due to the shake correction (movement of the image reading area). For this reason, even if the amount of light (distribution) incident on the photographing optical system is uniform, if the peripheral light amount of the image plane falls due to optical restrictions of the photographing optical system, the movement of the image reading area causes the image reading area to move. Even if the light amount distribution changes, it is possible to adjust the output gain from all the pixels in this area so that an output equivalent to that when all the pixels receive the same light amount is obtained. Therefore, the brightness variation in the photographing screen, which has conventionally occurred in synchronization with the shake correction, hardly occurs.

Specifically, storage means for storing light quantity distribution information of the light passing through the image pickup optical system on the image plane is provided, and from this storage means, on the image reading area corresponding to the signal from the shake detection means. The light intensity distribution information of is read. Then, based on the read light amount distribution information, the output gain of the pixel on the side of high light reception is changed to be equal to the output gain of the pixel on the side of low light reception, or the pixel on the side of low light reception is changed. The output gain may be changed so as to be equal to the output gain of the pixel on the side where the amount of received light is large.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 shows the configuration of a video camera (optical device) according to a first embodiment of the present invention.

In the figure, reference numeral 1 denotes a photographing lens such as a zoom lens having a variable power lens or a single-focus telephoto lens. The photographing lens 1 has a shift lens (shake correction lens) 2 that is shifted for camera shake correction.

A CCD 3 as an image pickup device is provided at a position corresponding to the focus surface (image surface) of the taking lens 1. The image signal from the CCD 3 is output to a camera process circuit (not shown) in the subsequent stage.

Further, 4 is a microcomputer (control means) for controlling the entire camera, and 5 is a shake sensor composed of a vibration gyro or the like, and detects the shake of the video camera as an angular velocity or an angle.

Reference numeral 6 denotes an actuator which is provided with a driving force in the horizontal and vertical directions in the plane orthogonal to the optical axis of the taking lens 1 for the shift lens 2 and is constituted by, for example, a voice coil motor.

Reference numeral 7 denotes a gain controller for adjusting the amount of received light of each pixel of the CCD 3 and the gain of the output signal, which is controlled by a signal from the microcomputer 4.

Reference numeral 8 is a memory. In this memory 8,
Light amount distribution information on the focus surface (the effective image pickup area 3a of the CCD 3 in this embodiment) of the entire light flux obtained by the taking lens 1 is stored in advance, and the shift lens according to the shake signal from the shake sensor 5 is stored. The microcomputer 4 reads the information on the light amount distribution on the CCD 3 at each position when 2 is driven for shake correction.

FIG. 2 shows the light amount distribution information of the memory 8.
A more detailed description will be given with reference to (A) and (B). The light amount distribution mentioned here indicates a light amount distribution caused by a peripheral light amount drop caused by an optical restriction of the photographing lens 1 when the light amount (distribution) incident on the photographing lens 1 is uniform.

FIG. 2A shows a light quantity distribution on the CCD 3 of the entire luminous flux obtained by the photographing lens 1 in a state where the shift lens 2 is located on the center of the optical axis and the shake correction is OFF.

The light amount distribution becomes 100%, 80%, 60%, 40%, 20% darker from the optical axis side toward the peripheral portion. Effective image pickup area 3a of CCD 3
Above, the light flux near the axial center of the light flux arrives, so 1
A light amount of 00% to 80% is obtained.

FIG. 2B shows a state in which the shift lens 2 is shifted from the center of the optical axis so as to correct the shake in accordance with the shake signal from the shake sensor 5 in the shake correction ON state. . In this state, the light amount distribution of the light flux that reaches the effective image pickup area 3a of the CCD 3 becomes a light amount distribution that becomes dark from 100% light amount to 40% light amount from the upper left of the screen to the lower right of the screen.

Therefore, in the memory 8, the shake signal of the shake sensor 5 and the light quantity distribution information of the light flux reaching the effective image pickup area 3a of the CCD 3 in the state where the shift lens 2 corresponding to the shake signal is shifted are stored. It is associated and stored as a memory table.

In the video camera thus constructed, the shake signal from the shake sensor 5 is input to the microcomputer 4 when the shake correction is ON.
The microcomputer 4 drives the actuator 6 according to the shake signal and shifts the shift lens 2. As a result, the shake of the captured image due to camera shake is corrected.

Further, at this time, the microcomputer 4 responds to the shake signal of the shake sensor 5 with the light quantity distribution of the light flux arriving on the effective image pickup area 3a of the CCD 3 in a state where the shift lens 2 corresponding to the shake signal is shifted. The information is read from the memory table of the memory 8.

Then, the microcomputer 4 drives the gain controller 7 on the basis of the light amount distribution information read from the memory 8 so that the gains of the output signals of the respective pixels in the effective image pickup area 3a of the CCD 3 can be calculated in the effective image pickup area 3a. Control is performed so as to output a signal equivalent to that when all pixels receive the same amount of light.

For example, when the shift lens 2 is displaced to the position shown in FIG. 2B, the light amount distribution of the light flux reaching the effective image pickup area 3a of the CCD 3 is from the upper left of the screen of the area 3a to the lower right of the screen. The light intensity distribution becomes darker from 100% light intensity to 40% light intensity.

At this time, the microcomputer 4 reduces the output gains from the pixels within the range of 100%, 80% and 60% of the amount of received light so that all the pixels in the area 3a receive the amount of 40%. The gain controller 7 is driven so as to output a signal equivalent to the time.

As described above, the gain controller 7 is driven so that the light amount distribution on the image pickup area 3a of the CCD 3 becomes uniform according to the shake signal at the output level of all pixels (apparent), so that the vibration control is performed. It is possible to effectively prevent fluctuations in brightness within the shooting screen that have occurred in synchronization with the shift movement of the shift lens 2 at the time of work, and obtain a natural shot image.

In this embodiment, the case where the output gain of each pixel of the CCD 3 is directly changed by the gain controller 7 has been described. For example, the output signal from each pixel of the CCD 3 is converted from an analog image signal to a digital image. Alternatively, the digital image signal may be converted into a signal, the digital image signal may be captured in a frame memory, and the gain of the digital image signal corresponding to each pixel of the CCD 3 may be changed by the gain controller on the frame memory.

In the present embodiment, when the gain controller 7 is driven so that the light amount distribution in the effective image pickup area 3a is apparently uniform according to the displacement of the shift lens 2, the effective image pickup is performed between consecutive frame images. Although the light amount distribution on the area 3a fluctuates, the displacement of the shift lens 2 is continuously changed, so that the minimum light amount range is 40% as a minimum light amount range on the effective imaging area 3a shown in FIG. 2B, for example. When the light amount distribution changes so that there is a range of 80% light amount as the lowest light amount range shown in FIG. 2A continuously, the output of all the pixels of the effective image pickup area 3a according to the changing position of the shift lens 2. Output level equivalent to that when receiving 40% light amount of gain is obtained Output level equivalent to when receiving 60% and 80% light amount from output gain Sequentially to the output gains, as varied and may be configured to continuously change the light amount between the frame images successive.

As a result, it is possible to reduce the occurrence of abrupt changes in the amount of light between consecutive frame images.

Further, in the present embodiment, the video camera of the type in which the optical axis is tilted by driving the shift lens 2 in the plane orthogonal to the optical axis to correct the image blur has been described. It can also be applied to an optical device of a type in which the optical axis is tilted by rotating the optical axis within a curved surface having the optical axis as a normal line to correct image shake.

(Second Embodiment) In the first embodiment,
The case has been described in which the output gain of the pixel on the side with a large amount of light received (100 to 60%) according to the light amount distribution is reduced to match the output gain of the pixel on the side with a small amount of light received (40%). The output gain of the pixel on the side with less light may be increased so as to match the output gain of the pixel on the side with a large amount of received light.

For example, when the light amount distribution on the image pickup area 3a includes 100% light amount to 40% light amount, the whole is 100%.
The output gain of each pixel may be adjusted so as to obtain an output level equivalent to that when the% light amount is received.

(Third Embodiment) In the first and second embodiments, the output gain of the pixel on the side receiving a large amount of light according to the light amount distribution is reduced to match the output gain of the pixel on the side receiving a small amount of light. Alternatively, the case has been described in which the output gain of the pixel on the side receiving a small amount of received light is increased to match the output gain of the pixel on the side receiving a large amount of received light, but these may be combined. For example, the output gain of a pixel receiving 100% light amount is reduced to an output gain that gives an output level equivalent to that when receiving 80% light amount, and
The output gains of the pixels receiving the 0% and 40% light amounts may be increased to the output gains at which an output level equivalent to that when the 80% light amount is received is obtained.

(Fourth Embodiment) FIG. 3 shows a fourth embodiment of the present invention.
The structure of the video camera which is embodiment is shown. In the above-described first to fourth embodiments, the optical image stabilization type video camera that shifts the shift lens to perform camera shake correction has been described, but in the embodiments after the present embodiment, C
Image readout area on CD (output imaging area 13
An electronic image stabilization type video camera that electrically corrects the shake by moving a) will be described.

In FIG. 3, reference numeral 11 denotes a photographing lens such as a zoom lens having a variable power lens or a single-focus telephoto lens. The taking lens 11 is a fixed imaging lens 12
have. A CCD 13, which is an image sensor, is provided on the focusing surface of the taking lens 11. The image signal from the CCD 13 is output to the camera process circuit (not shown) in the subsequent stage.

Here, as shown in FIG. 4, the CCD 13 has a total pixel area 13a of, for example, 680,000 pixels, and in the total pixel area 13a, for example, pixels of an output image pickup area 13b of 350,000 pixels arbitrarily cut out. The output signal of is output as an image signal.

Further, 14 is a microcomputer (control means) for controlling the entire camera, and 15 is a shake sensor composed of a vibration gyro or the like, and detects the shake of the video camera as an angular velocity or an angle.

Reference numeral 16 is the total pixel area 1 in the CCD 13.
A cutout position designating circuit for designating a cutout position of the output imaging area 13b cut out from the inside 3a, and is controlled by a signal from the microcomputer 14 which receives a shake signal from the shake sensor 15.

Reference numeral 17 denotes a gain controller for adjusting the amount of received light of each pixel of the CCD 13-the gain of the output signal, which is controlled by a signal from the microcomputer 14.

Reference numeral 18 is a memory. In the memory 18, light amount distribution information on the focus surface (in the present embodiment, the entire pixel area 13a of the CCD 3) of the entire light flux obtained by the taking lens 1 is stored in advance, and the shake signal from the shake sensor 15 is stored. Output image pickup area 13 cut out from all pixel area 13a in CCD 13 according to
The microcomputer 14 reads the information on the light amount distribution at the position of b.

FIG. 4 shows the light amount distribution information of the memory 18.
Will be described in more detail using. The light amount distribution mentioned here indicates a light amount distribution caused by a peripheral light amount drop caused by an optical restriction of the photographing lens 1 when the light amount (distribution) incident on the photographing lens 1 is uniform.

The light quantity distribution shown in FIG.
1 shows a light amount distribution of the entire light flux obtained by 1 on the entire pixel area 13a of the CCD 13. Light intensity distribution is 100%, 80%, 60%, 40% from the optical axis side to the periphery.
%, 20% and it becomes dark.

As shown by the solid line in FIG. 4, the shake correction is O
In the FF state, the center of the output imaging area 13b coincides with the optical axis, but at this time, since the light flux near the axial center of the light flux reaches the output imaging area 13b, 100% to 80%.
% Light intensity is obtained.

An area A shown by a broken line in FIG. 4 is cut out from the whole pixel area 13a of the CCD 13 so as to correct the image shake according to the shake signal from the shake sensor 15 when the shake correction is ON. The displaced position of the output imaging area 13b is shown.

In this state, the light amount distribution of the light flux reaching the output image pickup area 13b becomes a light amount distribution which becomes dark from 100% light amount to 40% light amount from the lower right part of the screen to the upper left part of the screen.

Therefore, in the memory 18, the shake sensor 1
The shake signal of No. 5 and the information of the light amount distribution of the light flux that reaches the output imaging area 13b in which the cutout position corresponding to the shake signal is displaced are stored in association with each other.

In the video camera thus constructed, when the shake correction is ON, the shake sensor 15
The shake signal from is input to the microcomputer 14. The microcomputer 14 responds to the shake signal by C
The cutout position of the output imaging area 13b is displaced within the all pixel area 13a of the CD 13. As a result, image vibration due to camera shake is corrected.

At this time, the microcomputer 14
Reads out from the memory table of the memory 18 the information on the light quantity distribution of the light flux that reaches the output imaging area 13b whose cutout position is displaced in accordance with the shake signal from the shake sensor 15.

The microcomputer 14 drives the gain controller 17 based on the light amount distribution information read from the memory 18 so that the gain of the output signal of each pixel in the output image pickup area 13b is the same in all the pixels in the output image pickup area 13a. Control is performed so as to output a signal equivalent to that when receiving a large amount of light.

For example, when the output imaging area 13b is displaced to the position of the area A shown by the broken line in FIG. 4, the CCD 1
The light quantity distribution of the light flux reaching the output imaging area 13b of No. 3 is 10 from the lower right of the screen of the area 13b to the upper left of the screen.
The light amount distribution becomes dark from 0% light amount to 40% light amount.

At this time, the microcomputer 14 reduces the output gain from the pixels within the range of 100%, 80% and 60% of the amount of received light, respectively, and outputs the output image pickup area 13.
The gain controller 17 is driven so as to output a signal equivalent to that when all the pixels in a receive the light amount of 40%.

In this way, the CCD 13 is responsive to the shake signal.
The light amount distribution on the output imaging area 13a moving up is
Since the gain controller 17 is driven so as to be uniform above (apparently) the output level of all pixels in the output image pickup area 13a, the image stabilization operation (output image pickup area 13a) is performed.
(Movement of), it is possible to effectively prevent the brightness variation within the shooting screen that has occurred in synchronization with the above, and it is possible to obtain a natural shot image.

In the present embodiment, the case where the output gain of each pixel of the CCD 13 is directly changed by the gain controller 17 has been described. For example, the CCD 1
The output signal from each pixel of 3 is converted from an analog image signal into a digital image signal, this digital image signal is taken into a frame memory, and the CCD 13
The gain of the digital image signal corresponding to each pixel may be changed by the gain controller.

Further, in the present embodiment, when the gain controller 17 is driven so that the light amount distribution in the moving output image pickup area 13b is apparently uniform, the light amount distribution on the output image pickup area 13b between consecutive frame images is increased. However, since the output image pickup area 13b moves continuously, the output image pickup area 13b is continuously moved from a state in which the output image pickup area 13b has a minimum light amount range of 40% as in the area A shown in FIG. When the light amount distribution changes in a state in which there is a range of 80% light amount as the minimum light amount range shown by the solid line in 4, the output gain of all pixels in the output image pickup area 13b is 40% according to the moving position of the output image pickup area 13b.
The output gain that is equivalent to when receiving the light amount is changed from the output gain that is equivalent to when receiving the light amount of 60% and 80% to the output gain that is equivalent to when receiving the light amount. The amount of light between consecutive frame images may be continuously changed.

As a result, it is possible to reduce the occurrence of abrupt changes in the amount of light between consecutive frame images.

(Fifth Embodiment) In the fourth embodiment,
The case has been described in which the output gain of the pixel on the side with a large amount of light received (100 to 60%) according to the light amount distribution is reduced to match the output gain of the pixel on the side with a small amount of light received (40%). The output gain of the pixel on the side with less light may be increased so as to match the output gain of the pixel on the side with a large amount of received light.

For example, when the light amount distribution on the output image pickup area 13b includes 100% light amount to 40% light amount, the output image pickup area is obtained so as to obtain an output level equivalent to that when the entire 100% light amount is received. The output gain of each pixel in 13b may be adjusted.

(Sixth Embodiment) In the above fourth and fifth embodiments, the output gain of the pixel on the side receiving a large amount of light according to the light amount distribution is reduced to match the output gain of the pixel on the side receiving a small amount of light. Alternatively, the case has been described in which the output gain of the pixel on the side receiving a small amount of received light is increased to match the output gain of the pixel on the side receiving a large amount of received light, but these may be combined.

For example, in the output image pickup area 13b, the output gain of the pixel receiving 100% of the light amount is 80%.
The output gain is reduced to obtain an output level equivalent to that when receiving the light amount, and the output gains of pixels that receive 60% and 40% light amount are equivalent to when receiving 80% light amount. You may make it increase to the output gain which can obtain various output levels.

In each of the above embodiments, the video camera has been described, but the present invention can also be applied to a digital still camera having a moving image shooting function.

[0071]

As described above, according to the first and second inventions of the present application, the output of each pixel is output in accordance with the change in the light amount distribution on the image sensor or the image reading area due to the shake correction operation. The gain can be adjusted. For this reason,
Even if the amount of light (distribution) incident on the shooting optical system is uniform, the amount of light on the image sensor or image reading area is corrected by the shake correction operation when there is a drop in the peripheral light amount on the image plane due to optical restrictions of the shooting optical system. Even if the distribution changes, the output gain can be adjusted so that all the pixels in the image sensor or the image reading area can obtain an output equivalent to that all the pixels receive the same light amount. it can. Therefore, it is possible to prevent the occurrence of brightness variation in the photographing screen, which has conventionally occurred in synchronization with the shake correction operation, and it is possible to obtain a high-quality photographed image.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an optical image stabilization type video camera that is a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a relationship between a light amount distribution on an image plane and an image sensor in the video camera according to the first embodiment.

FIG. 3 is a block diagram showing the configuration of an electronic image stabilization type video camera that is a second embodiment of the present invention.

FIG. 4 is a diagram illustrating a relationship between a light amount distribution on an image plane and an output imaging area in the video camera according to the second embodiment.

FIG. 5 is a cross-sectional view of a conventional optical device having a camera shake correction function.

FIG. 6 is a diagram for explaining peripheral light amount drop due to vignetting.

FIG. 7 is a diagram showing a change in light amount distribution due to shake correction.

FIG. 8 is a diagram showing a change in screen brightness in electronic image stabilization.

[Explanation of symbols]

1,11 shooting lens 2 shift lens 3,13 CCD 4,14 Microcomputer 5,15 shake sensor 6 actuators 7,17 Gain controller 8,18 memory 16 Cutting position designation circuit

Claims (12)

[Claims] 1. An image pickup device for photoelectrically converting an optical image formed by a photographing optical system, a shake detecting unit for outputting a signal according to a shake of the apparatus, and a shake detecting unit provided in the photographing optical system. A shake correction lens that corrects the shake of a captured image by being driven so as to tilt the optical axis according to the output of the shake correction lens; and when the shake correction lens is driven, based on a signal from the shake detection unit. An optical device, comprising: a control unit that changes an output gain with respect to the amount of light received by each pixel in the image sensor. 2. A storage means for storing light quantity distribution information on the image plane of light that has passed through the image pickup optical system, wherein the control means outputs a signal from the shake detection means from the storage means. The optical device according to claim 1, wherein the light amount distribution information on the image pickup device is read according to the read light amount distribution information, and the output gain of each pixel in the image pickup device is changed based on the read light amount distribution information. 3. The control means changes the output gain of a pixel on the side of a large amount of received light on the image sensor so as to be equal to the output gain of a pixel on the side of a small amount of received light. The optical device according to claim 1. 4. The control means changes the output gain of a pixel on the image pickup device on the side receiving a small amount of received light so as to be equal to the output gain of the pixel on the side receiving a large amount of received light. The optical device according to claim 1. 5. The control means lowers an output gain of a pixel on a side having a large amount of received light on the image sensor to a predetermined value,
The optical device according to claim 1, wherein the output gain of the pixel on the side with a small amount of received light is increased to the predetermined value. 6. The optical device according to claim 1, wherein the control unit changes the output gain of each pixel stepwise for each imaging frame. 7. An image pickup device for photoelectrically converting an optical image formed by a photographing optical system, a shake detecting unit for outputting a signal according to a shake of the apparatus, and an image pickup device on the image pickup device according to a signal from the shake detecting unit. And a control unit for correcting the shake of the captured image by moving the image read area in the image reading area, and the control unit reads the image based on a signal from the shake detecting unit during shake correction. An optical device characterized by changing an output gain with respect to a light receiving amount of each pixel in an area. 8. A storage unit for storing light amount distribution information of an image plane of light passing through the image pickup optical system, wherein the control unit outputs a signal from the shake detection unit from the storage unit. The optical device according to claim 7, wherein the light amount distribution information on the corresponding image reading area is read, and the output gain of each pixel in the image reading area is changed based on the read light amount distribution information. . 9. The control means changes the output gain of the pixel on the side where the amount of received light is large on the image reading area so as to be equal to the output gain of the pixel on the side where the received amount of light is small. The optical device according to claim 7. 10. The control means changes the output gain of the pixel on the side where the amount of received light is small on the image reading area so as to be equal to the output gain of the pixel on the side where the received amount of light is large. The optical device according to claim 7. 11. The control means lowers an output gain of a pixel having a large amount of received light on the image reading area to a predetermined value, and raises an output gain of a pixel having a small amount of received light to the predetermined value. The optical device according to claim 7, which is characterized in that 12. The optical device according to claim 7, wherein the control unit changes the output gain of each pixel stepwise for each imaging frame.